The iMac “Core i5” 2.7 21.5-Inch Aluminum (Overdue 2012) includes a 22 nm Quad Core 2.7 GHz Intel “Core i5” I5-3330S (Ivy Bridge) processor with four independent processor cores on a single chip, a 6 MB shared level 3 cache, 8 GB of 1600 MHz DDR3 SDRAM (which isn’t intended to be upgraded after purchase), a 1 TB (5400 RPM) hard drive, and a NVIDIA GeForce GT 640M graphics processor with 512 MB of dedicated GDDR5 memory. It also has a built-in “FaceTime HD” webcam and stereo speakers, but lacks an optical drive. This model has a 21.5″ 1920×1080 LED-backlit 16:9 widescreen IPS display with the “cover glass fully laminated to the LCD and anti-reflective coating.” The rear of the case is aluminum and is thicker within the middle and tapers to a razor thin 5 mm on the edges. Connectivity includes four USB 3.0 ports, dual Thunderbolt ports, Gigabit Ethernet, 802.11n, and Bluetooth 4.0.
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2.7 GHz quad-core Intel Core i5 processor (Turbo Spice up as much as 3.2GHz) with 6MB L3 cache
1 TB (5400-rpm) hard drive, 8 GB (two 4GB) of 1600MHz DDR3 memory
21.5-inch (diagonal) LED-backlit display with IPS technology; 1920-by-1080 resolution